Wyoming Pesticide Applicator Certification Practice Test

What is a 'toxin' typically found in nature?

1. An artificial chemical compound used in pesticides.

2. A synthetic substance used to enhance plant growth.

3. A naturally occurring poison produced by microorganisms.

4. A naturally occurring poison produced by plants, animals, or microorganisms.

The correct answer is: A naturally occurring poison produced by plants, animals, or microorganisms.

Toxins are harmful substances produced by living organisms, such as plants, animals, and microorganisms. Option A is incorrect because it refers to artificial (man-made) chemicals, not naturally occurring toxins. Option B is also incorrect because it mentions a synthetic (man-made) substance, not a natural toxin. Option C is partially correct, as toxins are indeed produced by microorganisms, but it is too specific and does not include the fact that toxins can also be produced by plants and animals. Option D encompasses all of these possibilities and is the most accurate answer.